In foreign language learning and education, social psychological variables are of utmost importance. These variables can highly affect the learners? performance and their achievement level, especially when they learn in a community of peers. One of the most influential psycho-social domains in language pedagogy is Perceived Social Self-Efficacy; ?an individual?s confidence in his/her ability to engage in the social interactional tasks necessary to initiate and maintain interpersonal relationships? (Smith and Betz, 2000). This book has aimed to focus on the relationship between the perceived social self-efficacy of EFL students and their foreign language classroom anxiety.